SSW fans - Where art thou?

[nachoman]

When I used to watch SP trains around Phoenix and Tucson in the mid-1990s, it would seem they would throw any kind of locomotive they had available onto any kind of mainline train. Mainline trains were frequently a mix of SD40-2, SD45, SD40T-2, with frequent appearances of other SDs or even 4-axle GP units. From what I remember, they weren't running any 1st generation diesels (ex. GP7-18) by then, and were 95% EMD diesels in my area. I do remember some newer GP60s with wide cabs. GP35, GP38-2, GP40-2 or 50 would have been extremely common for local switching (and still are).